Abstract: The present invention relates to fluorescent, benzotriazole-containing dye compounds, which possess a high workability, desirable optical properties, and a good light stability, while suppressing the formation of a precipitate. The invention further relates to a wavelength-converting encapsulant layer, which is formed using the wavelength-converting encapsulant composition comprising said fluorescent, benzotriazole dye compounds. The fluorescent, benzotriazole-containing dye compounds are represented by general formula (I). wherein the variables are defined in the specification.

Abstract: The present invention relates to fluorescent, benzotriazole-containing dye compounds, which possess high processability, desirable optical characteristics and good photostability, while suppressing the formation of a precipitate, and to dye polymers comprising the same. The present invention further relates to a wavelength-converting encapsulant composition comprising said dye polymer and to a photovoltaic module, which comprises a layer comprising said wavelength-converting encapsulant. The polymer fluorescent benzotriazole-containing dye compound is represented by general formula (I): where the variables are defined in the specification.

Abstract: The present invention provides a polarizing film having a high dichroic ratio. The polarizing film contains a disazo compound represented by the following general formula (1). In the general formula (1), Q1 represents a phenyl group having at least one —SO3M group; Q2 represents a naphthylene group having at least one —SO3M group; X represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a thioalkyl group having 1 to 4 carbon atoms, a halogeno group, or a polar group; subscript k denotes the number of substitutions of X and represents an integer of 0 to 5; and M represents a counter ion, where when k is an integer of 2 or more, Xs are the same or different.

Abstract: The present invention provides a polarizing film having a high dichroic ratio. The polarizing film includes a disazo compound represented by the following general formula (1). In the general formula (1), Q represents a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenyl group having a heterocyclic ring; non-adjacent carbon atoms of the phenyl group may be substituted with nitrogen atoms; R1 represents an alkyl group; R2 represents a hydrogen, an acetyl group, or a substituted or unsubstituted benzoyl group; n represents 1 or 2; and M represents a counter ion.

Abstract: The retardation film of the present invention contains a thermoplastic polymer having at least a side chain component (A) oriented in a direction substantially orthogonal to a slow axis, and the absorption edge wavelength (?cut-off) of the side chain component (A) is 330 nm or more, and an in-plane retardation value (Re[450]) at a wavelength of 450 nm is smaller than that (Re[650]) at a wavelength of 650 nm. In the above-mentioned retardation film, the difference (?Re650-450=Re[650]?Re[450]) between the in-plane retardation value (Re[650]) at a wavelength of 650 nm and the in-plane retardation value (Re[450]) at a wavelength of 450 nm is preferably 10 nm or more. The retardation film of the present invention exhibits optical characteristics in which the in-plane birefringence is large and the difference between a retardation value on the short wavelength side and a retardation value on the long wavelength side is large.

Abstract: The present invention provides a polarizing film having a high dichroic ratio. The polarizing film contains a disazo compound represented by the following general formula (1). In the general formula (1), Q1 represents a phenyl group having at least one —SO3M group; Q2 represents a naphthylene group having at least one —SO3M group; X represents an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a thioalkyl group having 1 to 4 carbon atoms, a halogeno group, or a polar group; subscript k denotes the number of substitutions of X and represents an integer of 0 to 5; and M represents a counter ion, where when k is an integer of 2 or more, Xs are the same or different.

Abstract: The birefringent film of the present invention contains an aromatic polyester having a repeating unit represented by the following general formula (1). In the general formula (1), A(s), B(s), C(s), and D(s) are each independently represent a group selected from a halogeno group, an alkyl group which has 1 to 6 carbon atoms, and an aryl group. Also, a and b each represent an integer of 0 to 4, and c and d each represent an integer of 0 to 3. R1 represents a hydrogen atom, or an alkyl group which has 1 to 10 carbon atoms. R2 represents an alkyl group which has 2 to 10 carbon atoms. R3 to R6 each independently represent a group or atom selected from a hydrogen atom, a halogeno group, an alkyl group which has 1 to 6 carbon atoms, and an aryl group. Furthermore, l and m each represent an integer of 2 or more.

Abstract: The present invention provides an optical film exhibiting wavelength dispersion such that a retardation value is smaller on the shorter wavelength side, and capable of being also formed comparatively thinly. The optical film of the present invention is an optical film including a polyimide-based polymer represented by the following general formula (I). In the formula (I), m is 40% by mol or more and 100% by mol or less. R1 and R2 each independently denote a substituent having a carbon-carbon double bond or a triple bond. A, A?, B, B?, E, G, and H each denote a substituent, and small letters corresponding to these alphabets denote substitution number thereof. X and Y each independently denote bond part such as a covalent bond. The substituents having a carbon-carbon double bond or a triple bond represented by R1 and R2 are a substituted or unsubstituted aryl group, a substituted or unsubstituted vinyl group, and a substituted or unsubstituted ethynyl group.

Abstract: [Object] The present invention provides a liquid crystal panel with which a display with extremely small change in color depending on a viewing direction can be realized, and a liquid crystal display including the same. [Solution to Problem] The liquid crystal panel includes: a first polarizer 30; a second polarizer 50; a first optical compensation layer 60; a second optical compensation layer 70; and a liquid crystal cell 40. The first polarizer 30 is arranged on one surface of the liquid crystal cell 40. The second polarizer 50 is arranged on the other surface of the liquid crystal cell 40. The first optical compensation layer 60 is arranged between the liquid crystal cell 40 and the first polarizer 30. The second optical compensation layer 70 is arranged between the liquid crystal cell 40 and the second polarizer 50. The first optical compensation layer 60 satisfies the following mathematical formulae (1) and (2).

Abstract: An ester-based polymer to be used in the present invention has at least a repeating unit represented with the general formula (I). A and B are substituents substituted on a stilbene group. R1 is a hydrogen atom, a linear or branched alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group. R2 is a linear or branched alkyl group having 2 to 10 carbon atoms. R3 to R6 each independently represents a hydrogen atom, a halogen atom, a linear or branched alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group. n is an integer of 2 or more.

Abstract: The invention relates to an optical film containing polymers having different repeating units, and methods for production thereof. Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The optical film of the invention advantageously has not only high solubility in solvents but also a high level of transparency since the polymers used in the optical film are compatible with each other. Further, wavelength dispersion of the birefringence of the optical film can be controlled by merely changing a ratio of polymers.

Abstract: An object of the present invention is to provide an optical film exhibiting a preferable wavelength dispersion and capable of being formed comparatively thinly. The present invention is an optical film containing the repeating unit represented by the following general formula (II). In the formula (II), A, A?, B, and B? each denote a substituent, a, a?, b, and b? denote the number of substituents of the corresponding A, A?, B, and B?. A, A?, B and B? each independently denote a halogen or an alkyl group having 1 to 4 carbon atoms. R1 and R2 denote a halogen, an alkyl group having 1 to 10 carbon atoms, and the like. X denotes —CO—, —SO2—, and the like.

Abstract: An object of the present invention is to provide an optical film exhibiting a preferable wavelength dispersion and capable of being formed comparatively thinly. The present invention is an optical film containing the repeating unit represented by the following general formula (II). In the formula (II), A, A?, B, and B? each denote a substituent, a, a?, b, and b? denote the number of substituents of the corresponding A, A?, B, and B?. A, A?, B and B? each independently denote a halogen or an alkyl group having 1 to 4 carbon atoms. R1 and R2 denote a halogen, an alkyl group having 1 to 10 carbon atoms, and the like. X denotes —CO—, —SO2—, and the like.

Abstract: The invention relates to an optical film containing polyester with a specific structure, and methods for production thereof. Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The polyester may be obtained by condensation polymerization of dicarboxylic acid compound(s) and bisphenol compound(s), and preferably has no halogen atom in its chemical structure. According to the invention, high productivity of the optical film can be achieved since the polyester has a high solubility in solvents, and an environmental loading for production can be reduced.

Abstract: The invention relates to a resin solution containing polyester with a specific structure, an optical film containing the polyester, and methods for production thereof Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The polyester may be obtained by condensation polymerization of dicarboxylic acid compound(s) and bisphenol compound(s), and preferably has no halogen atom in its chemical structure. According to the invention, high productivity of the optical film can be achieved since the polyester has a high solubility in solvents, and an environmental loading for production can be reduced.

Abstract: The present invention provides a polarizing film having a high dichroic ratio. The polarizing film of the present invention contains an azo compound represented by the following general formula (1). In the general formula (1), the OH group is attached to the naphthalene ring at an ortho position relative to the azo group attached to the ring, R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted acetyl group, a substituted or unsubstituted benzoyl group, or a substituted or unsubstituted phenyl group, M represents a counterion, m represents an integer of 0 to 2, n represents an integer of 0 to 6, at least one of m and n is not 0, and Q represents an anthraquinone ring having an OH group.

Abstract: An optical film of the present invention comprises a polyimide-based polymer represented by the following general formula (V). The optical film of the present invention exhibits an optical property such that wavelength dispersion of retardation scarcely changes ranging from the short wavelength side to the long wavelength side. Typically, the optical film of the present invention may be used as a retardation film of a liquid crystal display device.

Abstract: The invention relates to an optical film containing aromatic polymer which shows high solubility to solvents, and methods for production thereof. Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The optical film may be attained by using polyester with a specific structure. The polyester with a specific structure may be obtained by condensation polymerization of bisphenol compound(s) and dicarboxylic acid compound(s) with biphenyl structure, and preferably has no halogen atom in its chemical structure. The optical film of the invention advantageously has not only high solubility in solvents but also a high level of heat resistance and birefringence producing capability. When the content of the biphenyl structure is high, the optical film of the invention can also have large wavelength dispersion of birefringence.

Abstract: [Object] The present invention provides a liquid crystal panel with which a display with extremely small change in color depending on a viewing direction can be realized, and a liquid crystal display including the same. [Solution to Problem] The liquid crystal panel includes: a first polarizer 30; a second polarizer 50; a first optical compensation layer 60; a second optical compensation layer 70; and a liquid crystal cell 40. The first polarizer 30 is arranged on one surface of the liquid crystal cell 40. The second polarizer 50 is arranged on the other surface of the liquid crystal cell 40. The first optical compensation layer 60 is arranged between the liquid crystal cell 40 and the first polarizer 30. The second optical compensation layer 70 is arranged between the liquid crystal cell 40 and the second polarizer 50. The first optical compensation layer 60 satisfies the following mathematical formulae (1) and (2).

Abstract: The invention relates to an optical film containing aromatic polymer which shows high solubility to solvents, and methods for production thereof. Further, the invention also relates to an optical laminate, a polarizing plate, and an image display device each using the optical film. The optical film may be attained by using polyester with a specific structure. The polyester with a specific structure may be obtained by condensation polymerization of bisphenol compound(s) and dicarboxylic acid compound(s) with biphenyl structure, and preferably has no halogen atom in its chemical structure. The optical film of the invention advantageously has not only high solubility in solvents but also a high level of heat resistance and birefringence producing capability. When the content of the biphenyl structure is high, the optical film of the invention can also have large wavelength dispersion of birefringence.